UNITAID aims to promote sustainable and affordable access to medicines, diagnostics, and preventative items for HIV/AIDS, tuberculosis, and malaria through market-based approaches. It works through partnerships and focuses on being a market catalyst, creator, or fixer depending on the needs. For HIV diagnostics, UNITAID has conducted landscape analyses to inform its priorities. It is calling for projects to increase diagnostic access and will evaluate proposals based on their potential market and public health impacts, innovation, and value for money. UNITAID is also engaging other organizations to coordinate efforts to improve HIV diagnostic markets.